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Re: rollback after crash

From: <sybrandb_at_yahoo.com>
Date: 14 Dec 2005 07:45:01 -0800
Message-ID: <1134575101.026283.29880@g47g2000cwa.googlegroups.com> 





redo is NEVER EVER overwritten. It may be lost because of the crash,
but NOT overwritten.



Any transaction without a commit marker is an incomplete transaction
and will be rolled back.


The sequence during recovery is


rollback


rollforward



Bear in mind rollback segments are ordinary data segments and DBWR/LGWR
mechanisms apply.


-- 
Sybrand Bakker
Senior Oracle DBA


Received on Wed Dec 14 2005 - 09:45:01 CST












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